Clutch-pulley



(No Model.)

E. BLAKE.

CLUTCH PULLEY.

No. 396,977. L Patented Jan. 29, 1889.

N. PETERS. Pnnlo'mnngnphcr, washmgmn. D. C.`

UNTTED STATES ATnNT Trice,

'EVANS BLAKE, OF ROCKFORD, ILLINOIS.

CLUTCH-PU LLEY.

SPECIFICATION forming part of Letters Patent No. 396,97*?, dated January 29, 1889.

Application tiled July 25, 1887. Serial No. 245,232. (No model.)

To a/ZZ 107mm/ it may concern:

Be it known that l, EVANS BLAKE, a citizen of the lnited States, residing in the city of Rockford, county of \\"innehag'o, and State et Illinois, have invented certain new and uset'ul Improvementts in (flutch-lulleys, ot which the followin is a specification.

This invention relates to a class of pulleys known as the elnich-pulleys.7 Its object is to produce a more el'licient article of its class at a reduced cost; and to this ond I have designed and constructed the apparatus repre- 5 is an isometrical representation ot' the lever l mechanism, and Fig. (i is a transverse section on dotted line c.

The pulley l (represented in the figures) is in the main substantially the same as pulleys heretofore in use, and is mounted to revolve on its shaft-support 2, and a collar, 3, fixed on the shaft prevents a movement of the pulley in one direction on its shaft-support. A groove, et, is formed in the inner surface ot the rim of the pulley, and a wood filling, 5, is iiXed therein, and a V-shaped groove, 6, in its inner tace Yt'orms the t'rictional su rt'ace ot. the pulley.

The fixed portion of the driving` mechanism to the pulley consists of ahub, 7, 'lived to the shaft against the huh end ot' the pulley, a bellshaped portion, S, extend in over the end portion of the pulley-huh and a disk-web, Stradiating` from the open end of thehell-formed portion. ot the disk and ext-ends from its inner edge to its periphery on opposite sides of the shat't, and radial slots ll are formed inv the rih centrallyon opposite sides, and tianges 13 on opposite sides ot' the slots ll rise from the hell.

portion and extend from the disk to the hul) in parallel lines. Iiriction-sectors 14 are provided with parallel radial ribs l5 to receive the ribs l0 on the disk to slide radially there- A rib, l0, projects Afrom the inner face on, and a screw, lo, passed through the slot llv and s(:row-threaded into the sector serves to hold it in place to permit ot' a limited radial sliding movement.

The peripheral. rims olf the t'rictioli-seetors l-t are beveled in V shape to enter t-he V- shaped `groove on the inner tace ot pulleyrim.

The sectors l-L are provided with a slot, 17, and cars '1R projecttherclrom on each side of the slot and receive one end ot' a lever, IST), which is pivotally connected therewith.

A screw, 20, which terms the At'ulerum-support to the lever l2), is pivoted, in a slotted portion, l2, ot. the lever, and its screw-tlireaded portion is secured in a screw-threaded thi mble, 2l, which capable ot' a rotary movement in its support in the wall ot' the hellshaped portion S of the driving,l mechanism between` the flanges V123, risingl from its periphery. The inner end ot the thimhle 2l, is made in a screw-nut t'orm to receive a wrench, by which it may he turned to raise or lower the tulerum-support of the lever.

A link, 22, connects the outer end ot' the lever 19 with a slidingl head, 23, mounted on the sliat't-suplgiort.

An annular groove, .2-l, is t'ormed in the sliding' head, which receives a lever, 25, employed to impart a sliding' movement tothe head endwise on its shaft-support.

To adjust the friction mechanism to the required holding, torce, the sliding head is moved to the position shown in Fig. 2, and the thimble 2l is then turned to press the friction-sectors into the V-groove in the rim ot the pulley with a torce suieient to hold it t'or the purposes required, after which the movements of the shifting-lever to the position shown in Figs. 2 and 2l connect and disconnect the friction mechanism with the pulley to stop and start the machinery Vwith which the pulley is connected.

In the foregoiu I have employed but two friction-sectors; hut more -than. two maybe employed.

I have also employed wood in the pulley to t'orm the friction-groove; but instead thereotl any other material capable of use for the purpose maybe employed, or the V-shaped groove may be formed in the pulley in the solid.

IOO

From the foregoing it will be seen that by the movement of the shifting-lever to the position shown in Fig. 2 the friction-sectors will be forced to engage the pulley, and that the position of the parts will be suoli as to hold them in eng-agement, and when the shiftinglever is carried to the position shown in Fig. 3 the sectors will be withdrawn from their frictional Contact and the pulley will be free to revolve on its shaft-support.

I claim as my inventionl. The combination, with a pulley, a fric- 1 tion device to move into and out ol' engagement with the pulley, a hub, and an operating-head, of a lever connecting,` the operatinghead with the friction device, and an adj ustable fulcrum to the lever, whereby the holding force of the friction mechanism is regulated, substantially as set forth.

2. The combination, with a pulley, a hub, a friction-sector, and an operating` sliding head, j

of a lever connected at one end with the friction-sector` and its other end connected to the operating,` sliding head, and an adjustable fnlcrum to the lever to regulate the holding force of the friction mechanism, substantially as and for the purpose set forth.

The combination, With the pulley, the friction device, the sliding head, the thimblesupport, and the thimble, of the lever connecting the friction-sectors and the sliding head, and a fulcrum to the lever, said fulcrum having a screw-connection with the thimblesupport, said thimble capable of a rotary movement in its support to adjust the fulcrum, substantially as and for the purpose set forth.

EVANS BLAKE.

\Vitnesses:

JACOB BEHEL, A. E. HoLT. 

